Looks there was similar report from upstream: http://marc.info/?l=linux-fsdevel&m=142865378923064&w=2
but still don't have resolution or further report. Also I tried to use fbench to create lots of files, list dirs concurently for reproducing the issue, but can't reproduce it yet. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1440536 Title: Oops __d_lookup+0x88/0x194 Status in The Linux Kernel: Unknown Status in linux package in Ubuntu: Triaged Status in linux source package in Vivid: Triaged Bug description: This started happening on a Mustang board after upgrading to 3.19.0-9.9 and persists in 3.19.0-11. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-11-generic 3.19.0-11.11 ProcVersionSignature: Ubuntu 3.19.0-11.11-generic 3.19.3 Uname: Linux 3.19.0-11-generic aarch64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Dec 31 1969 seq crw-rw---- 1 root audio 116, 33 Dec 31 1969 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.17-0ubuntu1 Architecture: arm64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory: 'iw' Date: Sun Apr 5 08:32:28 2015 HibernationDevice: RESUME=UUID=014663f6-5135-4075-bf04-d2f42c4fc90b IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: console=ttyS0,115200n8 ro earlyprintk=uart8250-32bit,0x1c020000 RelatedPackageVersions: linux-restricted-modules-3.19.0-11-generic N/A linux-backports-modules-3.19.0-11-generic N/A linux-firmware 1.143 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux SystemImageInfo: current build number: 0 device name: ? channel: daily last update: Unknown UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1440536/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp